king arms 516 with tons of upgrades 2 magazines ambidextrous seletor switch working mock bolt gate aster mosfet $73 gate nova trigger $29 mgp cqb backup sights $30 pts pistol grip $21 krytac butt stock $53 prowin/dytac hop unit $30 maple leaf 6.03 inner barrel $35 4uad friction pro bucking/nub $14 matrix 3000 high torque motor $45 real steel mlok hand guard $60 mlok aluminum hand stop $25 mlok panel covers $6 fiber optic acog green dot sight$65 guns base price is $300 upgrades and parts $486 $786 all guns sold by me come with a warranty so if it every stops working for any reason bring it back and i will fix it for free. asking $375 or best offer